{"id":272,"date":"2022-05-30T09:52:03","date_gmt":"2022-05-30T09:52:03","guid":{"rendered":"https:\/\/typedarray.org\/?p=272"},"modified":"2022-06-04T06:01:57","modified_gmt":"2022-06-04T06:01:57","slug":"javascript-replace-is-not-a-function-error","status":"publish","type":"post","link":"https:\/\/typedarray.org\/javascript-replace-is-not-a-function-error\/","title":{"rendered":"JavaScript replace is not a function Error"},"content":{"rendered":"\n

If you get a ‘replace is not a function’ error in JavaScript, it is because you have called the replace() method on a value that is not a string. To fix this, make sure you convert the value to a String using the toString() method before calling replace(). Alternatively, you can check the type of the value using the typeof operator to make sure it is a string before calling replace().<\/strong><\/p>\n\n\n

\n
\"javascript<\/figure><\/div>\n\n\n

JavaScript ‘replace is not a function’ Error<\/h2>\n\n\n\n

If you’re working with strings in JavaScript, you may sometimes need to use the replace() <\/a>method to modify or replace parts of the string. This method can be called on any string value, and it takes two arguments: the first argument is the substring that should be replaced, and the second argument is the replacement string.<\/p>\n\n\n\n

However, if you try to call replace() on a value that is not a string, you will get an error saying “replace is not a function”. This is because the replace() method is only available on string values.<\/p>\n\n\n\n

Here is an example of how the error occurs –<\/p>\n\n\n\n

We try to call replace() on a number value:<\/p>\n\n\n\n

var num = 10;\n\nnum.replace(\/0\/g, "5"); \/\/ "replace is not a function" error<\/code><\/pre><\/div>\n\n\n\n
To fix this, we can convert the num variable to a string using the toString() method before calling replace():<\/p>\n\n\n\n
var replacedString = num.toString().replace(\/0\/g, "5");\n\nconsole.log(replacedString); \/\/ "15"<\/code><\/pre><\/div>\n\n\n\n
Note that replace method doesn’t alter the original String. It just returns the replaced String.<\/p>\n\n\n\n
Alternatively, we can use the typeof operator to check the type of the num variable before calling replace():<\/p>\n\n\n\n
if (typeof num === "string") {\n\nvar replacedString = num.replace(\/0\/g, "5");\n\nconsole.log(replacedString); \/\/\n\n} else {\n\nconsole.log("num is not a string");\n\n}<\/code><\/pre><\/div>\n\n\n\n
In the above code, we first check the type of num using typeof. If it is a string, we call replace() on it. Otherwise, we print an error message.<\/p>\n\n\n\n
Let’s call this above code on num = 10;<\/p>\n\n\n\n
if (typeof num === "string") {\n\nvar replacedString = num.replace(\/0\/g, "5");\n\nconsole.log(replacedString); \/\/\n\n} else {\n\nconsole.log("num is not a string");\n\n}<\/code><\/pre><\/div>\n\n\n\n
Output<\/strong>:<\/p>\n\n\n\n
“num is not a string”<\/p>\n\n\n\n
As you can see from the output, we get an error because num is not a string.<\/p>\n\n\n\n
What happens if we call the above code on num = “10” ?<\/p>\n\n\n\n
if (typeof num === "string") {\n\nvar replacedString = num.replace(\/0\/g, "5");\n\nconsole.log(replacedString);\n\n} else {\n\nconsole.log("num is not a string");\n\n}<\/code><\/pre><\/div>\n\n\n\n
Output<\/strong>:<\/p>\n\n\n\n
15<\/p>\n\n\n\n
As you can see from the output, we don’t get an error because num is a string. We are able to successfully call replace() on it and replace 0 with 5.<\/p>\n\n\n\n
Conclusion<\/h2>\n\n\n\n
As you can see, the “replace is not a function” error can occur in different situations.<\/p>\n\n\n\n
To avoid this error, make sure you only call replace() on string values and that you convert any other type of value to a string before calling replace(). You can also use the typeof operator to check the type of a value before calling replace().<\/p>\n","protected":false},"excerpt":{"rendered":"
If you get a ‘replace is not a function’ error in JavaScript, it is because you have called the replace() method on a value that is not a string. To fix this, make sure you convert the value to a String using the toString() method before calling replace(). Alternatively, you can check the type of […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[5],"tags":[8],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/typedarray.org\/wp-json\/wp\/v2\/posts\/272"}],"collection":[{"href":"https:\/\/typedarray.org\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/typedarray.org\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/typedarray.org\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/typedarray.org\/wp-json\/wp\/v2\/comments?post=272"}],"version-history":[{"count":3,"href":"https:\/\/typedarray.org\/wp-json\/wp\/v2\/posts\/272\/revisions"}],"predecessor-version":[{"id":429,"href":"https:\/\/typedarray.org\/wp-json\/wp\/v2\/posts\/272\/revisions\/429"}],"wp:attachment":[{"href":"https:\/\/typedarray.org\/wp-json\/wp\/v2\/media?parent=272"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/typedarray.org\/wp-json\/wp\/v2\/categories?post=272"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/typedarray.org\/wp-json\/wp\/v2\/tags?post=272"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}